Inficon HLD6000, Translation Of The Original Operating Instructions

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6 | Operation INFICON
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Then calibration with the internal COOL-Check can be carried out, see
“Calibration with an internal COOL-Check [ } 49]“.
6.3.5 Verifying R290 with the sniffer line for R600a/R290
It is also possible to verify R290 (propane) with a sniffer line for R600a.
Switching on the note
on the R290
measurement
► > Gas
Activate the option to display an additional information text in the status line of the
measurement screen for the R290 measurement.
Selection Display in status line
R600a R600a
R290 R290 @ R600a
Further preparations Also note the following:
The measuring sensitivity for R290 is approx. 7% higher than for R600a.
You have the option of
• calibrating with an external calibration leak with R290 to avoid overly high displays
or
• calibrating with an external calibration leak with R600a.
If sniffing with the R290 then the displayed measurement results will be 7% too high.
It is therefore recommended to also set the setpoint 7% higher than for sniffing with
the R600a.
If the calibration has been carried out in g/a, for example, after switching to the units
mbar l/s or Pa m
3
/s, the measured values are inaccurate. When converting units from
R600a to R290, an average molecular weight of 51 g/mol is assumed for both gases.
► For the greatest possible accuracy, you should therefore calibrate directly in the
desired unit. Details of leakage rates in various units can be found in the
acceptance test certificate for the calibrated leak.
6.3.6 Calibrating
6.3.6.1 Time and type of calibration
The device should be calibrated daily and after every operator change.
HLD6000 with one PLUS sniffer line
An HLD6000 to which a PLUS sniffer line is connected must typically be in operation
for at least 30 minutes. Only then are all filter and measuring characteristics achieved.